| Name | Event | Round | Time | Imp | |
|---|---|---|---|---|---|
| 1 | Yasuhiro KOSEKI | 100 S Breast | Semifinals | 57.06 | +1.5% |
| 2 | Yasuhiro KOSEKI | 50 S Breast | Prelims | 26.74 | +0.9% |
| 3 | Ryosuke IRIE | 200 S Back | Prelims | 1:49.57 | – |
| 4 | Daiya SETO | 200 S Fly | Prelims | 1:50.82 | +0.7% |
| 5 | Yuki SHIRAI | 100 S Back | Semifinals | 50.85 | – |
| 6 | Ryosuke IRIE | 100 S Back | Semifinals | 50.16 | – |
| 7 | Yuki SHIRAI | 50 S Back | Prelims | 23.99 | – |
| 8 | Ryosuke IRIE | 50 S Back | Prelims | 23.75 | – |
| 9 | Takuro FUJII | 100 S Fly | Prelims | 51.19 | – |
| 10 | Kosuke HAGINO | 100 S Fly | Prelims | 49.83 | – |
